The magnitude 8.1 “Gorkha Earthquake” that hit Nepal on 25th April 2015 caused severe human and material damages in the country’s central part. Thousands of historic monuments, particularly within the Kathmandu Valley’s seven World Heritage Monument Zones, were affected. Svayambhū, a central place of devotion for Buddhists and Hindus of Nepal, India and Tibet, lost many priceless buildings. Among them is the Maṅgal Bahudvāra Caitya, which collapsed completely (fig. 1 and 3). In charge of the monument’s protection, the author, together with the local community and Nepal’s Department of Archaeology (DoA), decided to excavate the stūpa until a solid level of foundations (that would allow its reconstruction) could be identified. This paper presents some preliminary remarks on clay artefacts (Tib. tsha tsha) discovered during the protection and excavation campaigns carried on the monument. These objects shed lights on rituals executed during the different construction phases of the structure. They also provide valuable information about the donors’ cultural environment. To be published in 2024 in The Image as Instrument and Reflection of Ritual in Central Asia and the Himalayas: from Antiquity to the Present, Series Maior, L’Orientale Università degli Studi, Naples.